Of course the "masses" can be turned against scapegoats. That's why scapegoating is used: because it obviously works. If you're seriously asking this question, I would like another, better explanation for why anyone gives half a fuck about immigrants something something jobs, sexual deviants something something morality, flag burners something something... what? This is just from where I sit culturally, but the mechanics of scapegoating are the same in many expressions of, or aspirations to, power.
It so happens that it also manifests in some ways as a matter of course: to people with an immature but real class consciousness, conspicuous consumption is a target that's easier to identify and condemn than a massive and byzantine corruption. Plainly, most people can hardly reason with economy. To a poor person who does most things right and still doesn't get ahead of a struggle to survive, it's a lot easier to find and blame a privileged class of high-skilled labor that benefits disproportionately from this corruption. It's especially easy when real journalism is breathing its dying breaths, in which that other privileged class whose labor is devoted entirely to deeply researching the state of the world, and then exposing that research, has very few remaining outlets and proportionally an even smaller audience.
It might be that there isn't even a real, concerted effort to use these privileged workers as scapegoats, but rather that it happens because they are impressively easy to resent. Put yourself in the shoes of, say, a barista. Whose faces do you see buying your product that you very probably couldn't even afford? Who do you serve?
But it's still a gift to the actual ruling class, a tiny population of people who can exploit nearly everyone and everything. Wouldn't it be nice to have literally no economic worries in life, and let the plebes duke it out over the difference between paycheck-to-rent and paycheck-to-mortgage?